Plastic pipe reinforced by cross helically wound steel wires, namely, PSP, is a new plastic-matrix steel composite pipe developed in China recently, were theoretically and experimentally investigated herein. Although the steel wires carry most of the loading in a linear elastic way, time-dependent behavior was demonstrated in PSP, and was then the subject of further analysis and description. Based on the structural features of PSP and the viscoelastic behaviors of the matrix, a three-layer viscoelastic model was proposed to identify time-dependent elastic stresses and strains for PSP subjected to internal pressure. The experimental results showed that the hoop strain decreased slowly, while the axial strain increased by 0.16% in 14,000 min at constant internal pressure. Good agreement between theoretical results and experimental data demonstrated that the three-layer viscoelastic model was able to predict the time-dependent relationship of stress and strain. Finally, the effects of the steel-wire volume fraction and the winding angle on the creep behavior of PSPs subjected to an internal pressure were analyzed.

1.
Zheng
,
J.
,
Lu
,
Y.
,
Xiang
,
L.
,
Lin
,
X.
,
Zhu
,
Y.
,
Xu
,
P.
,
Chen
,
D.
,
He
,
X.
, and
Shao
,
T.
, 2008, “
Experimental Investigation on Mechanical Properties of Plastic Pipes Reinforced by Cross Helically Wound Steel Wires
,”
ASME J. Pressure Vessel Technol.
0094-9930,
130
(
2
), p.
021401
.
2.
Ma
,
W. Q.
,
Fang
,
W.
, and
Chang
,
K. D.
, 2002, “
Superficial Discussion on Steel Frame Plastic Composite Pipe
,”
Oil-Gasfield Surface Engineering
1006-6896,
21
(
1
), pp.
35
35
. 0002-7820
3.
Kruijer
,
M. P.
,
Warnet
,
L. L.
, and
Akkerman
,
R.
, 2006, “
Modelling of the Viscoelastic Behaviour of Steel Reinforced Thermoplastic Pipes
,”
Composites, Part A
1359-835X,
37
, pp.
356
367
.
4.
Naguib
,
W.
, and
Mirmiran
,
A.
, 2003, “
Creep Modeling for Concrete-Filled Steel Tubes
,”
J. Constr. Steel Res.
0143-974X,
59
, pp.
1327
1344
.
5.
Xiang
,
L.
, 2008, “
Study on Viscoelastic Behavior of Plastic Pipe Reinforced by Cross-Winding Steel Wires
,” Ph.D. thesis, Zhejiang University, Hangzhou, China, in Chinese.
6.
Lai
,
J.
, and
Bakker
,
A.
, 1995, “
Analysis of the Non-Linear Creep of High-Density Polyethylene
,”
Polymer
0032-3861,
36
(
1
), pp.
93
99
.
7.
Rubinstein
,
M.
, and
Colby
,
R. H.
, 2003,
Polymer Physics
,
Oxford University Press
,
Oxford
.
8.
Luo
,
W. B.
, 2001, “
Study on Nonlinear Viscoelasticity of Deformation Thermal Effect and Crazing in Polymer
,” Ph.D. thesis, Huazhong University of Science and Technology, Wuhan, China, in Chinese.
9.
Lui
,
W. B.
, and
Peng
,
J.
, 2007, “
Effects of Initial Load Levels and Crosshead Speed Levels on Viscoelastic Properties of Biodegradable Loose Fill Extrudates
,”
J. Food. Eng.
0260-8774,
80
(
1
), pp.
284
291
.
10.
Zhang
,
C.
, 2006,
Viscoelastic Fracture Mechanics
,
Scientific
,
Beijing, China
.
11.
Cai
,
E.
, 1989,
Viscoelastic Mechanics
,
Beijing University of Aeronautics and Astronautics
,
Beijing, China
.
12.
Zheng
,
J. Y.
,
Lin
,
X. F.
, and
Lu
,
Y. B.
, 2006, “
Stress Analysis of Plastic Pipe Reinforced by Cross Helically Wound Steel Wire
,”
Proceedings of the 2006 ASME Pressure Vessels and Piping Division Conference-ASME PVP2006/ICPVT-11 Conference
, Vancouver, BC, Canada, pp.
1
6
.
13.
Jones
,
R. M.
, 1975,
Mechanics of Composite Materials
,
Hemisphere
,
Washington, DC
.
14.
Chen
,
L. M.
, and
Yang
,
B. N.
, 2006,
Mechanics of Composite Materials
,
Science and Technology
,
Beijing, China
.
This content is only available via PDF.
You do not currently have access to this content.